Assalamu Alaikum Brothers in Islam,
I remember hearing a narration once. It goes something like this.
A jew or a mushrik rested at the Beloved Prophet Muhammed (saw) 's place one day and he defecated on the bed or something along those lines. and the prophet instead of employing his slaves to clean it, himself does it. and the the travelling jew witnesses this and converts to Islam.
Is there a narration like this in any of the hadith books? and if yes, is it authentic?